NY Times brings the story of Elliot Madison, a 41 year old anarchist who was arrested for spreading information on Twitter about police movements during the G20 in Pittsburgh last month:
On Thursday, F.B.I. agents descended on a house in Jackson Heights, Queens, and spent 16 hours searching it. The most likely reason for the raid: a man who lived therehad helped coordinate communications among protesters at the Group of 20 summit in Pittsburgh.
The man, Elliot Madison, 41, a social worker who has described himself as an anarchist, had been arrested in Pittsburgh on Sept. 24 and charged with hindering apprehension or prosecution, criminal use of a communication facility and possession of instruments of crime. The Pennsylvania State Police said he was found in a hotel room with computers and police scanners while using the social-networking site Twitter to spread information about police movements. He has denied wrongdoing.